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<h1>i2c.c</h1><a href="i2c_8c.html">gehe zur Dokumentation dieser Datei</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> *</span>
<a name="l00003"></a>00003 <span class="comment"> *    Rev:          $Id: i2c.c,v 1.1.1.1 2007/10/03 08:15:48 dstadelmann Exp $</span>
<a name="l00004"></a>00004 <span class="comment"> *    Revision:     $Revision: 1.1.1.1 $</span>
<a name="l00005"></a>00005 <span class="comment"> *    Source:       $Source: /cvs/lcv/SW/uclinux-dist/user/blkfin-apps/ppifcd-cgi-lcv/src/i2c.c,v $  </span>
<a name="l00006"></a>00006 <span class="comment"> *    Created:      06.07.2005 18:16</span>
<a name="l00007"></a>00007 <span class="comment"> *    Author:       Michael Hennerich</span>
<a name="l00008"></a>00008 <span class="comment"> *    mail:         hennerich@blackfin.uclinux.org</span>
<a name="l00009"></a>00009 <span class="comment"> *    Description:  Simple I2C Routines </span>
<a name="l00010"></a>00010 <span class="comment"> *                  </span>
<a name="l00011"></a>00011 <span class="comment"> *   Copyright (C) 2005 Michael Hennerich</span>
<a name="l00012"></a>00012 <span class="comment"> *</span>
<a name="l00013"></a>00013 <span class="comment"> *   This program is free software; you can redistribute it and/or modify</span>
<a name="l00014"></a>00014 <span class="comment"> *   it under the terms of the GNU General Public License as published by</span>
<a name="l00015"></a>00015 <span class="comment"> *   the Free Software Foundation; either version 2 of the License, or</span>
<a name="l00016"></a>00016 <span class="comment"> *   (at your option) any later version.</span>
<a name="l00017"></a>00017 <span class="comment"> *</span>
<a name="l00018"></a>00018 <span class="comment"> *   This program is distributed in the hope that it will be useful,</span>
<a name="l00019"></a>00019 <span class="comment"> *   but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00020"></a>00020 <span class="comment"> *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span>
<a name="l00021"></a>00021 <span class="comment"> *   GNU General Public License for more details.</span>
<a name="l00022"></a>00022 <span class="comment"> *</span>
<a name="l00023"></a>00023 <span class="comment"> *   You should have received a copy of the GNU General Public License</span>
<a name="l00024"></a>00024 <span class="comment"> *   along with this program; if not, write to the Free Software</span>
<a name="l00025"></a>00025 <span class="comment"> *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA</span>
<a name="l00026"></a>00026 <span class="comment"> *</span>
<a name="l00027"></a>00027 <span class="comment"> *</span>
<a name="l00028"></a>00028 <span class="comment"> ****************************************************************************</span>
<a name="l00029"></a>00029 <span class="comment"> * MODIFICATION HISTORY:</span>
<a name="l00030"></a>00030 <span class="comment"> * 29.11.2007 - Added "void" as return-type from i2c_scan_bus() and i2c_dump_register() - by Sebastian Kummer</span>
<a name="l00031"></a>00031 <span class="comment"> * 18.12.2007 - Made error-messages lcv-framework conform - by Sebastian Kummer</span>
<a name="l00032"></a>00032 <span class="comment"> * 18.12.2007 - Removed Main Function - by Sebastian Kummer</span>
<a name="l00033"></a>00033 <span class="comment"> ***************************************************************************/</span> 
<a name="l00034"></a>00034 
<a name="l00035"></a>00035 
<a name="l00036"></a>00036 <span class="preprocessor">#include "i2c-dev.h"</span>
<a name="l00037"></a>00037 <span class="preprocessor">#include "<a class="code" href="i2c_8h.html" title="Schnittstelle zu einem beliebigen I2C Bus.">i2c.h</a>"</span>
<a name="l00038"></a>00038 <span class="preprocessor">#include "<a class="code" href="log_8h.html" title="Ein Werkzeug zur Protokollierung.">log.h</a>"</span>
<a name="l00039"></a>00039 <span class="preprocessor">#include &lt;string.h&gt;</span>
<a name="l00040"></a>00040 <span class="preprocessor">#include &lt;stdlib.h&gt;</span>
<a name="l00041"></a>00041 <span class="preprocessor">#include &lt;sys/types.h&gt;</span>
<a name="l00042"></a>00042 <span class="preprocessor">#include &lt;sys/stat.h&gt;</span>
<a name="l00043"></a>00043 <span class="preprocessor">#include &lt;sys/poll.h&gt;</span>
<a name="l00044"></a>00044 <span class="preprocessor">#include &lt;stdio.h&gt;</span>
<a name="l00045"></a>00045 <span class="preprocessor">#include &lt;fcntl.h&gt;</span>
<a name="l00046"></a>00046 <span class="preprocessor">#include &lt;unistd.h&gt;</span>
<a name="l00047"></a>00047 <span class="preprocessor">#include &lt;sys/ioctl.h&gt;</span> 
<a name="l00048"></a>00048 
<a name="l00049"></a>00049 
<a name="l00050"></a><a class="code" href="i2c_8c.html#649ca8c7e017db38d09d4834dfccd361">00050</a> <span class="preprocessor">#define I2C_SLAVE_ADDR 0x38 </span><span class="comment">/* Randomly picked */</span> 
<a name="l00051"></a>00051 
<a name="l00052"></a>00052 
<a name="l00053"></a><a class="code" href="i2c_8h.html#aefacaff83104e4b19526ea1af6f7da5">00053</a> <span class="keywordtype">int</span> <a class="code" href="i2c_8c.html#aefacaff83104e4b19526ea1af6f7da5" title="Lies ein Register über einen I2C-Bus.">lcv_i2c_write_register</a>(<span class="keywordtype">char</span> * device, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> client, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> reg, <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> value)
<a name="l00054"></a>00054 {
<a name="l00055"></a>00055     <span class="keywordtype">int</span>    addr = <a class="code" href="i2c_8c.html#649ca8c7e017db38d09d4834dfccd361">I2C_SLAVE_ADDR</a>; 
<a name="l00056"></a>00056         <span class="keywordtype">char</span>   msg_data[32];
<a name="l00057"></a>00057     <span class="keyword">struct </span>i2c_msg msg = { addr, 0, 0, msg_data };
<a name="l00058"></a>00058     <span class="keyword">struct </span>i2c_rdwr_ioctl_data rdwr = { &amp;msg, 1 };
<a name="l00059"></a>00059     <span class="keywordtype">char</span> error_msg[256];    
<a name="l00060"></a>00060         
<a name="l00061"></a>00061     <span class="keywordtype">int</span> fd,i;
<a name="l00062"></a>00062 
<a name="l00063"></a>00063   <span class="keywordflow">if</span> ( (fd = open( device, O_RDWR ) ) &lt; 0 ) {
<a name="l00064"></a>00064     <span class="comment">//fprintf(stderr, "Error: could not open %s\n", device);</span>
<a name="l00065"></a>00065     sprintf(error_msg, <span class="stringliteral">"Could not open %s"</span>, device);    
<a name="l00066"></a>00066         printf(<span class="stringliteral">"%s %s:\nError: %s\n"</span>, <span class="stringliteral">"In Function"</span>, __FUNCTION__, error_msg);
<a name="l00067"></a>00067         <a class="code" href="log_8c.html#ff9ff7830b2121dcd8e64d7cc1252534" title="Schreibt einen Fehler-Eintrag in die Protokolldatei.">lcv_log_error</a>(error_msg, __FUNCTION__);
<a name="l00068"></a>00068     exit( 1 );
<a name="l00069"></a>00069   }
<a name="l00070"></a>00070 
<a name="l00071"></a>00071   <span class="keywordflow">if</span> ( ioctl( fd, I2C_SLAVE, addr ) &lt; 0 ) {
<a name="l00072"></a>00072     <span class="comment">//fprintf(stderr, "Error: could not bind address %x \n", addr );</span>
<a name="l00073"></a>00073     sprintf(error_msg, <span class="stringliteral">"Could not bind address %x"</span>, addr);      
<a name="l00074"></a>00074         printf(<span class="stringliteral">"%s %s:\nWarning: %s\n"</span>, <span class="stringliteral">"In Function"</span>, __FUNCTION__, error_msg);
<a name="l00075"></a>00075         <a class="code" href="log_8c.html#8478a914926d15bf375feb130ff51b3e" title="Schreibt einen Warnungs-Eintrag in die Protokoll-Datei.">lcv_log_warning</a>(error_msg, __FUNCTION__);
<a name="l00076"></a>00076   } 
<a name="l00077"></a>00077 
<a name="l00078"></a>00078         msg.len   = 3;
<a name="l00079"></a>00079     msg.flags = 0;
<a name="l00080"></a>00080         msg_data[0] = reg;
<a name="l00081"></a>00081         msg_data[2] = (0xFF &amp; value);
<a name="l00082"></a>00082         msg_data[1] = (value &gt;&gt; 8);
<a name="l00083"></a>00083         msg.addr = client;
<a name="l00084"></a>00084 
<a name="l00085"></a>00085   <span class="keywordflow">if</span> ( ioctl( fd, I2C_RDWR, &amp;rdwr ) &lt; 0 ) {
<a name="l00086"></a>00086     <span class="comment">//fprintf(stderr, "Error: could not write \n");</span>
<a name="l00087"></a>00087     sprintf(error_msg, <span class="stringliteral">"Could not write"</span>);      
<a name="l00088"></a>00088         printf(<span class="stringliteral">"%s %s:\nWarning: %s\n"</span>, <span class="stringliteral">"In Function"</span>, __FUNCTION__, error_msg);
<a name="l00089"></a>00089         <a class="code" href="log_8c.html#8478a914926d15bf375feb130ff51b3e" title="Schreibt einen Warnungs-Eintrag in die Protokoll-Datei.">lcv_log_warning</a>(error_msg, __FUNCTION__);
<a name="l00090"></a>00090   }
<a name="l00091"></a>00091 
<a name="l00092"></a>00092   close( fd );
<a name="l00093"></a>00093   <span class="keywordflow">return</span> 0;
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095 
<a name="l00096"></a><a class="code" href="i2c_8h.html#2b821832a74e3197fecba3661422cd27">00096</a> <span class="keywordtype">int</span> <a class="code" href="i2c_8c.html#2b821832a74e3197fecba3661422cd27" title="Schreibt ein Register über einen I2C-Bus.">lcv_i2c_read_register</a>(<span class="keywordtype">char</span> * device, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> client, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> reg)
<a name="l00097"></a>00097 {
<a name="l00098"></a>00098     <span class="keywordtype">int</span> addr = <a class="code" href="i2c_8c.html#649ca8c7e017db38d09d4834dfccd361">I2C_SLAVE_ADDR</a>; 
<a name="l00099"></a>00099     <span class="keywordtype">char</span> msg_data[32];
<a name="l00100"></a>00100     <span class="keyword">struct </span>i2c_msg msg = { addr, 0, 0, msg_data };
<a name="l00101"></a>00101     <span class="keyword">struct </span>i2c_rdwr_ioctl_data rdwr = { &amp;msg, 1 };
<a name="l00102"></a>00102     <span class="keywordtype">char</span> error_msg[256];
<a name="l00103"></a>00103         
<a name="l00104"></a>00104     <span class="keywordtype">int</span> fd,i;
<a name="l00105"></a>00105 
<a name="l00106"></a>00106   <span class="keywordflow">if</span> ( (fd = open( device, O_RDWR ) ) &lt; 0 ) {
<a name="l00107"></a>00107     <span class="comment">//fprintf(stderr, "Error: could not open %s\n", device);</span>
<a name="l00108"></a>00108     sprintf(error_msg, <span class="stringliteral">"Could not open %s"</span>, device);    
<a name="l00109"></a>00109         printf(<span class="stringliteral">"%s %s:\nError: %s\n"</span>, <span class="stringliteral">"In Function"</span>, __FUNCTION__, error_msg);
<a name="l00110"></a>00110         <a class="code" href="log_8c.html#ff9ff7830b2121dcd8e64d7cc1252534" title="Schreibt einen Fehler-Eintrag in die Protokolldatei.">lcv_log_error</a>(error_msg, __FUNCTION__);
<a name="l00111"></a>00111     exit( 1 );
<a name="l00112"></a>00112   }
<a name="l00113"></a>00113 
<a name="l00114"></a>00114   <span class="keywordflow">if</span> ( ioctl( fd, I2C_SLAVE, addr ) &lt; 0 ) {
<a name="l00115"></a>00115     <span class="comment">//fprintf(stderr, "Error: could not bind address %x \n", addr );</span>
<a name="l00116"></a>00116     sprintf(error_msg, <span class="stringliteral">"Could not bind address %x"</span>, addr);      
<a name="l00117"></a>00117         printf(<span class="stringliteral">"%s %s:\nWarning: %s\n"</span>, <span class="stringliteral">"In Function"</span>, __FUNCTION__, error_msg);
<a name="l00118"></a>00118         <a class="code" href="log_8c.html#8478a914926d15bf375feb130ff51b3e" title="Schreibt einen Warnungs-Eintrag in die Protokoll-Datei.">lcv_log_warning</a>(error_msg, __FUNCTION__);
<a name="l00119"></a>00119   } 
<a name="l00120"></a>00120 
<a name="l00121"></a>00121           msg_data[0]= reg;
<a name="l00122"></a>00122           msg.addr = client;
<a name="l00123"></a>00123           msg.len   = 1;
<a name="l00124"></a>00124           msg.flags = 0;
<a name="l00125"></a>00125 
<a name="l00126"></a>00126           <span class="keywordflow">if</span> ( ioctl( fd, I2C_RDWR, &amp;rdwr ) &lt; 0 ) {
<a name="l00127"></a>00127             <span class="comment">//fprintf(stderr, "Error: could not write \n");</span>
<a name="l00128"></a>00128             sprintf(error_msg, <span class="stringliteral">"Could not write"</span>);      
<a name="l00129"></a>00129                 printf(<span class="stringliteral">"%s %s:\nWarning: %s\n"</span>, <span class="stringliteral">"In Function"</span>, __FUNCTION__, error_msg);
<a name="l00130"></a>00130                 <a class="code" href="log_8c.html#8478a914926d15bf375feb130ff51b3e" title="Schreibt einen Warnungs-Eintrag in die Protokoll-Datei.">lcv_log_warning</a>(error_msg, __FUNCTION__);
<a name="l00131"></a>00131           };
<a name="l00132"></a>00132 
<a name="l00133"></a>00133                 msg.len   = 2;
<a name="l00134"></a>00134                 msg_data[0]=0;
<a name="l00135"></a>00135                 msg_data[1]=0;
<a name="l00136"></a>00136                 msg.flags = I2C_M_RD ;
<a name="l00137"></a>00137 
<a name="l00138"></a>00138             <span class="keywordflow">if</span> ( ioctl( fd, I2C_RDWR, &amp;rdwr ) &lt; 0 ) {
<a name="l00139"></a>00139                 <span class="comment">//fprintf(stderr, "Error: could not read back\n");</span>
<a name="l00140"></a>00140                 sprintf(error_msg, <span class="stringliteral">"Could not read back"</span>);      
<a name="l00141"></a>00141                         printf(<span class="stringliteral">"%s %s:\nWarning: %s\n"</span>, <span class="stringliteral">"In Function"</span>, __FUNCTION__, error_msg);
<a name="l00142"></a>00142                         <a class="code" href="log_8c.html#8478a914926d15bf375feb130ff51b3e" title="Schreibt einen Warnungs-Eintrag in die Protokoll-Datei.">lcv_log_warning</a>(error_msg, __FUNCTION__);
<a name="l00143"></a>00143                         close( fd );
<a name="l00144"></a>00144                         <span class="keywordflow">return</span> -1;          
<a name="l00145"></a>00145             } 
<a name="l00146"></a>00146 
<a name="l00147"></a>00147   close( fd );
<a name="l00148"></a>00148   <span class="keywordflow">return</span> (((<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>)msg_data[0])&lt;&lt;8 | ((<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>)msg_data[1]) );
<a name="l00149"></a>00149 }
<a name="l00150"></a>00150 
<a name="l00151"></a><a class="code" href="i2c_8h.html#d24ed091971ab74561f0180091122aa1">00151</a> <span class="keywordtype">void</span> <a class="code" href="i2c_8c.html#d24ed091971ab74561f0180091122aa1" title="Erstellt einen Dump eines Clients über einen I2C-Bus.">lcv_i2c_dump_register</a>(<span class="keywordtype">char</span> * device, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> client, <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> start, <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> end)
<a name="l00152"></a>00152 {
<a name="l00153"></a>00153     <span class="keywordtype">int</span>    addr = <a class="code" href="i2c_8c.html#649ca8c7e017db38d09d4834dfccd361">I2C_SLAVE_ADDR</a>; 
<a name="l00154"></a>00154         <span class="keywordtype">char</span>   msg_data[32];
<a name="l00155"></a>00155     <span class="keyword">struct </span>i2c_msg msg = { addr, 0, 0, msg_data };
<a name="l00156"></a>00156     <span class="keyword">struct </span>i2c_rdwr_ioctl_data rdwr = { &amp;msg, 1 };
<a name="l00157"></a>00157     <span class="keywordtype">char</span> error_msg[256];
<a name="l00158"></a>00158         
<a name="l00159"></a>00159     <span class="keywordtype">int</span> fd,i;
<a name="l00160"></a>00160 
<a name="l00161"></a>00161   <span class="keywordflow">if</span> ( (fd = open( device, O_RDWR ) ) &lt; 0 ) {
<a name="l00162"></a>00162     <span class="comment">//fprintf(stderr, "Error: could not open %s\n", device);</span>
<a name="l00163"></a>00163     sprintf(error_msg, <span class="stringliteral">"Could not open %s"</span>, device);    
<a name="l00164"></a>00164         printf(<span class="stringliteral">"%s %s:\nError: %s\n"</span>, <span class="stringliteral">"In Function"</span>, __FUNCTION__, error_msg);
<a name="l00165"></a>00165         <a class="code" href="log_8c.html#ff9ff7830b2121dcd8e64d7cc1252534" title="Schreibt einen Fehler-Eintrag in die Protokolldatei.">lcv_log_error</a>(error_msg, __FUNCTION__);
<a name="l00166"></a>00166     exit( 1 );
<a name="l00167"></a>00167   }
<a name="l00168"></a>00168 
<a name="l00169"></a>00169   <span class="keywordflow">if</span> ( ioctl( fd, I2C_SLAVE, addr ) &lt; 0 ) {
<a name="l00170"></a>00170     <span class="comment">//fprintf(stderr, "Error: could not bind address %x \n", addr );</span>
<a name="l00171"></a>00171     sprintf(error_msg, <span class="stringliteral">"Could not bind address %x"</span>, addr);      
<a name="l00172"></a>00172         printf(<span class="stringliteral">"%s %s:\nWarning: %s\n"</span>, <span class="stringliteral">"In Function"</span>, __FUNCTION__, error_msg);
<a name="l00173"></a>00173         <a class="code" href="log_8c.html#8478a914926d15bf375feb130ff51b3e" title="Schreibt einen Warnungs-Eintrag in die Protokoll-Datei.">lcv_log_warning</a>(error_msg, __FUNCTION__);
<a name="l00174"></a>00174   } 
<a name="l00175"></a>00175 
<a name="l00176"></a>00176 
<a name="l00177"></a>00177 
<a name="l00178"></a>00178   <span class="keywordflow">for</span>(i = start; i &lt; end; i++) {
<a name="l00179"></a>00179 
<a name="l00180"></a>00180           msg_data[0]= i;
<a name="l00181"></a>00181           msg.addr = client;
<a name="l00182"></a>00182           msg.len   = 1;
<a name="l00183"></a>00183           msg.flags = 0;
<a name="l00184"></a>00184 
<a name="l00185"></a>00185           <span class="keywordflow">if</span> ( ioctl( fd, I2C_RDWR, &amp;rdwr ) &lt; 0 ) {
<a name="l00186"></a>00186             <span class="comment">//fprintf(stderr, "Error: could not write \n");</span>
<a name="l00187"></a>00187             sprintf(error_msg, <span class="stringliteral">"Could not write"</span>);      
<a name="l00188"></a>00188                 printf(<span class="stringliteral">"%s %s:\nWarning: %s\n"</span>, <span class="stringliteral">"In Function"</span>, __FUNCTION__, error_msg);
<a name="l00189"></a>00189                 <a class="code" href="log_8c.html#8478a914926d15bf375feb130ff51b3e" title="Schreibt einen Warnungs-Eintrag in die Protokoll-Datei.">lcv_log_warning</a>(error_msg, __FUNCTION__);
<a name="l00190"></a>00190           };
<a name="l00191"></a>00191 
<a name="l00192"></a>00192                 msg.len   = 2;
<a name="l00193"></a>00193                 msg_data[0]=0;
<a name="l00194"></a>00194                 msg_data[1]=0;
<a name="l00195"></a>00195                 msg.flags = I2C_M_RD ;
<a name="l00196"></a>00196 
<a name="l00197"></a>00197             <span class="keywordflow">if</span> ( ioctl( fd, I2C_RDWR, &amp;rdwr ) &lt; 0 ) {
<a name="l00198"></a>00198               <span class="comment">//fprintf(stderr, "Error: could not read back\n");</span>
<a name="l00199"></a>00199               sprintf(error_msg, <span class="stringliteral">"Could not read back"</span>);        
<a name="l00200"></a>00200                   printf(<span class="stringliteral">"%s %s:\nWarning: %s\n"</span>, <span class="stringliteral">"In Function"</span>, __FUNCTION__, error_msg);
<a name="l00201"></a>00201                   <a class="code" href="log_8c.html#8478a914926d15bf375feb130ff51b3e" title="Schreibt einen Warnungs-Eintrag in die Protokoll-Datei.">lcv_log_warning</a>(error_msg, __FUNCTION__);
<a name="l00202"></a>00202             } <span class="keywordflow">else</span> {
<a name="l00203"></a>00203               fprintf(stderr, <span class="stringliteral">"Register %02x : %02x%02x \n"</span>,i, (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>)msg_data[0],(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>)msg_data[1]);
<a name="l00204"></a>00204             }
<a name="l00205"></a>00205   }
<a name="l00206"></a>00206  
<a name="l00207"></a>00207   close( fd );
<a name="l00208"></a>00208   <span class="keywordflow">return</span>;
<a name="l00209"></a>00209 }
<a name="l00210"></a>00210 
<a name="l00211"></a><a class="code" href="i2c_8h.html#fefa8202689ea920247d64e005ac5fca">00211</a> <span class="keywordtype">void</span> <a class="code" href="i2c_8c.html#fefa8202689ea920247d64e005ac5fca" title="Scannt den I2C-Bus.">lcv_i2c_scan_bus</a>(<span class="keywordtype">char</span> * device)
<a name="l00212"></a>00212 {
<a name="l00213"></a>00213     <span class="keywordtype">int</span>    addr = <a class="code" href="i2c_8c.html#649ca8c7e017db38d09d4834dfccd361">I2C_SLAVE_ADDR</a>; 
<a name="l00214"></a>00214         <span class="keywordtype">char</span>   msg_data[32];
<a name="l00215"></a>00215     <span class="keyword">struct </span>i2c_msg msg = { addr, 0, 0, msg_data };
<a name="l00216"></a>00216     <span class="keyword">struct </span>i2c_rdwr_ioctl_data rdwr = { &amp;msg, 1 };
<a name="l00217"></a>00217     <span class="keywordtype">char</span> error_msg[256];
<a name="l00218"></a>00218         
<a name="l00219"></a>00219     <span class="keywordtype">int</span> fd,i;
<a name="l00220"></a>00220 
<a name="l00221"></a>00221   <span class="keywordflow">if</span> ( (fd = open( device, O_RDWR ) ) &lt; 0 ) {
<a name="l00222"></a>00222     <span class="comment">//fprintf(stderr, "Error: could not open %s\n", device);</span>
<a name="l00223"></a>00223     sprintf(error_msg, <span class="stringliteral">"Could not open %s"</span>, device);    
<a name="l00224"></a>00224         printf(<span class="stringliteral">"%s %s:\nError: %s\n"</span>, <span class="stringliteral">"In Function"</span>, __FUNCTION__, error_msg);
<a name="l00225"></a>00225         <a class="code" href="log_8c.html#ff9ff7830b2121dcd8e64d7cc1252534" title="Schreibt einen Fehler-Eintrag in die Protokolldatei.">lcv_log_error</a>(error_msg, __FUNCTION__);
<a name="l00226"></a>00226     exit( 1 );
<a name="l00227"></a>00227   }
<a name="l00228"></a>00228 
<a name="l00229"></a>00229   <span class="keywordflow">if</span> ( ioctl( fd, I2C_SLAVE, addr ) &lt; 0 ) {
<a name="l00230"></a>00230     <span class="comment">//fprintf(stderr, "Error: could not bind address %x \n", addr );</span>
<a name="l00231"></a>00231     sprintf(error_msg, <span class="stringliteral">"Could not bind address %x"</span>, addr);      
<a name="l00232"></a>00232         printf(<span class="stringliteral">"%s %s:\nWarning: %s\n"</span>, <span class="stringliteral">"In Function"</span>, __FUNCTION__, error_msg);
<a name="l00233"></a>00233         <a class="code" href="log_8c.html#8478a914926d15bf375feb130ff51b3e" title="Schreibt einen Warnungs-Eintrag in die Protokoll-Datei.">lcv_log_warning</a>(error_msg, __FUNCTION__);
<a name="l00234"></a>00234   } 
<a name="l00235"></a>00235 
<a name="l00236"></a>00236         msg.len   = 1;
<a name="l00237"></a>00237     msg.flags = 0;
<a name="l00238"></a>00238         msg_data[0]=0;
<a name="l00239"></a>00239         msg_data[1]=0;
<a name="l00240"></a>00240 
<a name="l00241"></a>00241   <span class="keywordflow">for</span> ( i = 0; i &lt; 128; i++){  
<a name="l00242"></a>00242 
<a name="l00243"></a>00243         msg.addr = i;
<a name="l00244"></a>00244 
<a name="l00245"></a>00245   <span class="keywordflow">if</span> ( ioctl( fd, I2C_RDWR, &amp;rdwr ) &lt; 0 ) {
<a name="l00246"></a>00246     <span class="comment">//fprintf(stderr, "Error: could not write \n");</span>
<a name="l00247"></a>00247   }<span class="keywordflow">else</span>  
<a name="l00248"></a>00248         fprintf(stderr, <span class="stringliteral">"FOUND I2C device at 0x%X (8-bit Adrress 0x%X) \n"</span>,msg.addr,msg.addr&lt;&lt;1);
<a name="l00249"></a>00249 }
<a name="l00250"></a>00250 
<a name="l00251"></a>00251   close( fd );
<a name="l00252"></a>00252   <span class="keywordflow">return</span>;
<a name="l00253"></a>00253 }
</pre></div><hr size="1"><address style="text-align: right;"><small>Erzeugt am Wed Dec 19 16:38:17 2007 für LCV Framework von&nbsp;
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.3 </small></address>
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